Door lock



14,1967 R. M. HARVEY 3,352,587

DOOR LOCK Filed Aug. 22, 1966 FIG. I

FIGZ

INVENTOR ROBERT M. HARVEY djmwa ATTORNEYS United States Patent 3,352,587 DOOR LOCK Robert M. Harvey, 3430 N. Lake Shore Drive, Chicago, lll. 60657 Filed Aug. 22, 1966, Ser. No. 574,027

4 Claims. (Cl. 292-289) This invention relates to door locks, and more particularly to a detachable lock which can be attached to any hinged type door to secure it against unauthorized openmg.

Detachable locks have heretofore been proposed for positively locking hinged doors from the inside. Such locks can be used on any doors such as outside doors of homes and also on the doors of hotels, motels and the like to prevent any opening of the door as long as the lock is in place.

It is an object of the present invention to provide an improved door lock which is simple and inexpensive to construct, easy to mount and dismount, and which will positively and securely hold the door against opening.

Another object is to provide a door lock which can be used on doors of different thickness and having different types of frames.

The above and other objects and advantages of the invention will be more readily apparent from the following description when read in connection with the accompanying drawing, in which:

FIGURE 1 is a perspective view of a door lock embodying the invention in disassembled condition; and

FIGURE 2 is a partial section through a door and door frame showing the door lock of the invention mounted thereon.

The door lock itself as shown in FIGURE 1 comprises an elongated strip of sheet metal 10 which is bent over at one end to provide an outwardly extending flange 11 thereon. Preferably, the flange 11 tapers outwardly from its point of integral connection to the strip 10, although the exact shape of the flange is not critical. At its opposite end the strip is bent over to define a flange 12 parallel to and extending in the same direction as the flange 11. The strip 10 is formed intermediate its ends with a series of punched openings 13 lying centrally of the width of the strip and spaced apart lengthwise thereof.

A pin 14, which is preferably a cylindrical steel pin, is adapted to extend through any one of the several openings 13 and is of a size to fit snugly therein without fitting so tightly as to be difficult to insert or remove. The pin 14 is of a length to project substantially beyond each side of the strip when it is inserted in one of the openings therein.

The lock is completed by a pair of blocks 15, which are preferably of square or rectangular section and which may be cubes as shown. These blocks may be formed of any desired material but are preferably molded plastic. Each block is formed with a cylindrical opening there-through which is positioned eccentrically with respect to the faces of the block which it intersects and which is parallel to four of the sides of the block and perpendicular to the two remaining sides. The opening 16 in one block is preferably of a size to have a press fit on one end of the pin 14 so that the pin and said one block will remain connected at all times. The pin has a slip fit in the opening in the other block so that it can be slipped onto or removed from the pin by hand.

As shown in FIGURE 2, the lock is mounted in conjunction with a hinged type door 17 which is swingable into and out of an opening in a door frame 18. A stop strip 19 is provided on the outside of the door to limit its movement in the outward direction. The door may carry the usual spring-pressed latch partly shown at 21, which will enter a complementary recess 22 in the door frame and which faces the free edge of the door in registry with the latch 21 when the door is closed. The usual metal latch plate 23 may be secured over the opening in the door frame to be engaged by the latch. It will be understood that, as customary, the door frame and latch plate may be formed with two or more openings to receive, for example, the usual spring-pressed latch plate as well as a separate locking bolt carried by the door.

To mount the lock of the present invention on such a door, the strip 10 is placed over the edge of the door frame with the flange 11 thereon projecting int-o the opening 22 which may be representative of any of the several openings provided in the door frame and latch plate. The door is then closed, as shown in FIGURE 2, there normally being adequate clearance between the door and the frame so that the door can swing over the relatively thin lock strip without binding. The pin 14, with one of the blocks thereon, is then inserted through one of the openings 13 in the portion of the strip which projects beyond the door and frame. Preferably, although not necessarily, the pin is inserted in the first opening closest to the door and the frame. Thereafter, the other block 15 is slipped over the projecting end of the pin 14 to leave the parts in a condition substantially as shown in FIGURE 2.

It will be noted that due to the eccentric positioning of the openings 16 in the blocks 15, the blocks can be adjusted to accommodate different spacings between the pin 14 and the faces of the door and the frame. Thus as shown in FIGURE 2, the block at the right-hand side is turned to a position such that a side thereof which is close to the opening 16 will abut the door frame, while the block at the left is turned to a different position such that a side thereof which is a greater distance from the opening 16 will abut the face of the door. It is to be noted that the blocks do not need to engage the faces of the frame and door tightly but are preferably turned to a position such that minimum clearance will exist between the blocks and the door or the frame.

With the door lock of the invention in place as shown in FIGURE 2, it will be seen that it is impossible to open the door. Any attempt to swing the door open will cause its face to press against the left-hand block as shown in FIGURE 2, which will positively hold it against opening. The right-hand block serves principally to brace the pin 14 so that it cannot wobble in the opening 13 through which it extends thereby to provide greater strength and a more positive holding action. To remove the lock, the blocks 15 can simply he slipped off of the pin and the pin removed from the lock strip. Thereafter, the door can freely be opened and the strip can be removed for reuse.

While one embodiment of the invention has been shown and described in detail, it will be understood that this is for the purpose of illustration only and is not to be taken as a definition of the scope of the invention, reference being had for this purpose to the appended claims.

What is claimed is:

1. A door lock for use in combination with a door hinged to a frame to swing between a closed position in the frame and an open position out of the frame and in which the frame is formed with a recess facing the free edge of the door when it is closed, comprising an elongated strip of sheet material to fit between the free edge of the door and the frame when the door is closed, an outwardly extending projection on one end of the strip fitting into the recess in the door frame, the strip being of a length to project beyond the faces of the frame and door, an elongated pin, means to connect the pin to the projecting portion of the strip at different positions in the length thereof with one end of the pin extending over the free edge of the door, and a block formed with an eccentric opening therein to fit over the pin, the block being tumable to different positions on the pm to engage the face of the door adjacent to its free edge to hold the door against opening.

2. The construction of claim 1 in which the means to connect the pin to the strip comprises a series of spaced holes in the strip into which the pin can fit selectively.

3. The construction of claim 2 in which the pin projects beyond both sides of the strip and there is a second block having an eccentric opening therein fitting over the other end of the pin and engageable with the face of the door frame.

4. The construction of claim 3 in which the blocks are substantially cubical.

References Cited UNITED STATES PATENTS MARVIN A. CHAMPION, Primary Examiner.

10 E. I. MCCARTHY, Asiristant Examiner. 

1. A DOOR LOCK FOR USE IN COMBINATION WITH A DOOR HINGED TO A FRAME TO SWING BETWEEN A CLOSED POSITION IN THE FRAME AND AN OPEN POSITION OUT OF THE FRAME AND IN WHICH THE FRAME IS FORMED WITH A RECESS FACING THE FREE EDGE OF THE DOOR WHEN IT IS CLOSED, COMPRISING AN ELONGGATED STRIP OF SHEET MATERIAL TO FIT BETWEEN THE FREE EDGE OF THE DOOR AND THE FRAME WHEN THE DOOR IS CLOSED, AN OUTWARDLY EXTENDING PROJECTION ON ONE END OF THE STRIP FITTING INTO THE RECESS IN THE DOOR FRAME, THE STRIP BEING OF A LENGTH TO PROJECT BEYOND THE FACES OF THE FRAME AND DOOR, AN ELONGATED PIN, MEANS TO CONNECT THE PIN TO THE PROJECTING PORTION OF THE STRIP AT DIFFERENT POSITIONS IN THE LENGTH THEREOF WITH ONE END OF THE PIN EXTENDING OVER THE FREE EDGE OF THE DOOR, AND A BLOCK FORMED WITH AN ECCENTRIC OPENING THEREIN TO FIT OVER THE PIN, THE BLOCK BEING TURNABLE TO DIFFERENT POSITIONS ON THE PIN TO ENGAGE THE FACE OF THE DOOR ADJACENT TO ITS FREE EDGE TO HOLD THE DOOR AGAINST OPENING 